[Gnuplot-info] Parametric surface read from a file

[Gregory M. <rgm...@ho...>]

Hi GnuPlot Forum!
I am new to this forum and realitively new to Gnuplot so please be
patient...

I would like to read in a parametric surface description from an ASCII file
that has x, y and z columns, but I am not sure how I can do it.

Consider a torous example, invoked from withing Gnuplot :
splot [-pi:pi][-pi:pi] cos(u)*(cos(v)+3), sin(u)*(cos(v)+3), sin(v).

Instead, I would like to read in the x,y and z values from a file and
display the surface. My understanding is,
(although I maybe wrong) that Gnuplot internally computes the size of x,y,
and z arrays, and based on the array index figures out how to connect the
vertices. 
If this is right, after reading x,y and z from my file, do I have specify
size of each array? Or should I also pass u and v parameters?

If I am wrong, what would be the appropriate way to store the data. I could
not find any examples or tutorial on this 
specific task.

Thank you
Gregory Miecznik 


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